Transportation and Installation Requirements SUNNY CENTRAL 500CP XT/630CP XT/720CP XT/ 760CP XT/800CP XT/850CP XT/900CP XT/1000CP XT

Transcription

1 Transportation and Installation Requirements SUNNY CENTRAL 500CP XT/630CP XT/720CP XT/ 760CP XT/800CP XT/850CP XT/900CP XT/1000CP XT SCCPXT-TA-E7-en-72 Version 7.2 ENGLISH

2 Table of Contents SMA Solar Technology AG Table of Contents 1 Information on this Document Validity Nomenclature Product Overview Design of the inverter Devices of the Inverter Scope of Delivery Structure of the Communication Network Information for Installation Climatic Conditions Behavior in Case of Increasing Temperatures Requirements for the Mounting Location Supply Air and Exhaust Air Air Pressure Drops Switch-Off Function at Low Temperatures Low-Temperature Option Dimensions Dimensions of the Inverter Position of the Mounting Holes Dimensions of the Base Minimum Clearances Minimum Clearances for Outdoor Installation Minimum Clearances in Electrical Equipment Rooms Requirements for the Support Surface Requirements for the Foundation and Cable Routing Electrical Connection Cable Entry Requirements for the DC Connection DC Fuses DC Fuses with SMB Connection Kit DC Busbar Reduction of DC Input Currents for DC Fuses Requirements for Cable Routing between MV Transformer and Inverter Grounding Concept External Supply Voltage Communication Requirements for Data Cables External Setpoint External Fast Stop Remote Shutdown Transformer Protection Insulation monitoring Sunny String-Monitor Overview of Transport Options Preparing for Commissioning SCCPXT-TA-E7-en-72 Technical Information

3 SMA Solar Technology AG 1 Information on this Document 1 Information on this Document 1.1 Validity This document is valid for the following device types: Device type Production version OCU firmware version DSP firmware version SC 500CP 10 (Sunny Central 500CP XT) E R R SC 630CP 10 (Sunny Central 630CP XT) SC 720CP 10 (Sunny Central 720CP XT) SC 760CP 10 (Sunny Central 760CP XT) SC 800CP 10 (Sunny Central 800CP XT) SC 850CP 10 (Sunny Central 850CP XT) SC 900CP 10 (Sunny Central 900CP XT) SC 1000CP 10 (Sunny Central 1000CP XT) The production version is indicated on the type label. The firmware version can be read off from the user interface. Illustrations in this document are reduced to the essential and may deviate from the real product. 1.2 Nomenclature Complete designation Sunny Central Sunny Central Communication Controller Designation in this document Inverter SC-COM or communication unit Technical Information SCCPXT-TA-E7-en-72 3

4 2 Product Overview SMA Solar Technology AG 2 Product Overview 2.1 Design of the inverter Figure 1: Design of the Inverter Position A B C Designation Inverter cabinet Interface cabinet Connection area 2.2 Devices of the Inverter Figure 2: Devices of the inverter Position Device Description A Touch display Different kinds of inverter data can be viewed on the touch display. The touch display is only used to view data. The display screen is activated by touching the touch display. B Service interface The service interface allows access to the user interface. C Key switch The key switch is used to switch the inverter on and off. 4 SCCPXT-TA-E7-en-72 Technical Information

5 SMA Solar Technology AG 2 Product Overview Position Device Description D DC switchgear The DC switchgear disconnects the inverter from the PV array. E SC-COM The SC-COM is the communication unit of the inverter. The SC-COM establishes the connection between the inverter and the system operator. F AC disconnection unit The AC disconnection unit disconnects the inverter from the MV transformer. 2.3 Scope of Delivery Figure 3: Components included in the scope of delivery Position Quantity Designation A 1 Inverter B 1 Ventilation plate C 5 Kick plate D 1 Low-voltage HRC fuse handle (optional) E 1 Non-woven abrasive F 1 Desiccant bag G 68 Screw H 68 Nut I 136 Fender washer K 136 Spring washer L 80 Cable tie M 3 Cable support sleeve (9.5 mm to 16 mm) N 1 Circuit diagram, documentation, report Position of the LV/HRC fuse handle The LV/HRC fuse handle is located on the inside of the right-hand interface cabinet door. Technical Information SCCPXT-TA-E7-en-72 5

6 2 Product Overview SMA Solar Technology AG 2.4 Structure of the Communication Network In order to connect the inverter to a computer via the service interface or via the Internet, the communication unit must be integrated in a system network. To enable several inverters to be operated in the same network, the communication unit of each inverter must be assigned a unique network address. Depending on the order option, the inverter may be equipped with a managed switch. Figure 4: System network of two inverters (example) Monitoring and control can be organized in two separate networks: Monitoring network This network is used for monitoring, parameterization and remote diagnosis. Control network The grid operator uses this network to transmit grid management specifications to the inverters. The control network is used exclusively for grid management services that need to be transmitted and implemented within a specified time period. If only a low data transfer rate is required for monitoring, grid operator specifications can also be transmitted via the monitoring network. Only one network is required in this case. 6 SCCPXT-TA-E7-en-72 Technical Information

7 SMA Solar Technology AG 3 Information for Installation 3 Information for Installation 3.1 Climatic Conditions Behavior in Case of Increasing Temperatures Sunny Central 500CP XT/630CP XT/720CP XT/760CP XT/800CP XT/850CP XT/900CP XT At temperatures up to 25 C, the inverter works at 110% nominal power. At temperatures between 25 C and 50 C, the AC power supplied by the inverter decreases to 100% of the nominal power indirectly proportional to the increasing temperature. From 50 C upwards, the AC power of the inverter decreases significantly, only reaching half of the nominal power at 55 C. For example, the inverter with a nominal power of 900 kva will still supply 450 kva at 55 C. At ambient temperatures of 60 C, the inverter will only supply 10% of its nominal power. The inverter switches off at 62 C. Figure 5: Reduction of AC power with increasing temperature 25 C 40 C 50 C 55 C 60 C 62 C Sunny Central 500CP XT 550 kva 520 kva 500 kva 250 kva 50 kva 0 kva Sunny Central 630CP XT 700 kva 658 kva 630 kva 315 kva 63 kva 0 kva Sunny Central 720CP XT 792 kva 749 kva 720 kva 360 kva 72 kva 0 kva Sunny Central 760CP XT 836 kva 790 kva 760 kva 380 kva 76 kva 0 kva Sunny Central 800CP XT 880 kva 832 kva 800 kva 400 kva 80 kva 0 kva Sunny Central 850CP XT 935 kva 884 kva 850 kva 425 kva 85 kva 0 kva Sunny Central 900CP XT 990 kva 936 kva 900 kva 450 kva 90 kva 0 kva Technical Information SCCPXT-TA-E7-en-72 7

8 3 Information for Installation SMA Solar Technology AG Sunny Central 1000CP XT At temperatures up to 25 C, the inverter works at 110% nominal power. At temperatures between 25 C and 40 C, the AC power supplied by the inverter decreases to 100% of the nominal power indirectly proportional to the increasing temperature. At temperatures between 40 C and 50 C, the supplied AC power decreases to 90% of the nominal power. From 50 C upwards, the AC power of the inverter decreases significantly, only reaching 45% of the nominal power at 55 C. At ambient temperatures of 60 C, the inverter will only supply 9% of its nominal power. The inverter switches off at 62 C. Figure 6: Reduction of AC power with increasing temperature 25 C 40 C 50 C 55 C 60 C 62 C Sunny Central 1000CP XT 1,100 kva 1,000 kva 900 kva 450 kva 90 kva 0 kva 8 SCCPXT-TA-E7-en-72 Technical Information

9 SMA Solar Technology AG 3 Information for Installation Requirements for the Mounting Location The mounting location must be freely accessible at all times. The fresh air requirement of the inverter amounting to 3,000 m 3 /h must be assured. The mounting location must be below the maximum installation altitude. The ambient temperature must be within the operating temperature range. The fresh air must meet the 4S2 classification. Air Quality Classification for Mechanically Active Substances Ambient conditions for stationary application Class 4S2 a) Sand in air [mg/m 3 ] 300 b) Dust (suspended matter) [mg/m 3 ] 5.0 c) Dust (precipitation) [mg/m 3 ] 20 Installation sites where appropriate measures are taken to keep dust levels to a minimum Installation sites where no special measures have been taken to reduce the sand or dust levels and which are not located in the vicinity of sand or dust sources x x The inverter is protected against salt spray in accordance with EN Class 4C2 and can be operated near the coast, for example. Air Quality Classification for Chemically Active Substances Ambient conditions for stationary application Class 4C2 Mean value Limiting value a) Sea salt Occurrence of salt spray b) Sulfur dioxide [mg/m 3 ] c) Hydrogen sulfide [mg/m 3 ] d) Chlorine [mg/m 3 ] e) Hydrogen chloride [mg/m 3 ] f) Hydrogen fluoride [mg/m 3 ] g) Ammonia [mg/m 3 ] h) Ozone [mg/m 3 ] i) Nitrogen oxides [mg/m 3 ] Installation sites in rural or densely populated areas with little industry and moderate traffic volume Installation sites in densely populated areas with industry and high traffic volume x x Supply Air and Exhaust Air The inverter draws in the fresh air through the ventilation grids in the roof and blows it out again through the slits at the rear of the inverter. Technical Information SCCPXT-TA-E7-en-72 9

10 3 Information for Installation SMA Solar Technology AG The figure on the right shows the principle of air circulation within the inverter. Exhaust vent Figure 7: Dimensions of the exhaust vent Air Pressure Drops If the inverter is installed in an MV station or an electrical equipment room, ensure that the maximum pressure drop limits for supply air and exhaust air are not exceeded. Make sure that all the air exhausted from the inverter is ducted out. Pressure drop in case of air inlet Pressure drop in case of air outlet Air volume 45 Pa 25 Pa 3,000 m3/h Switch-Off Function at Low Temperatures At low temperatures, the inverter operates up to the switch-off threshold in feed-in operation with up to 110% of the nominal power. The temperature of the switch-off threshold is: 25 C. If the ambient temperature falls below the switch-off threshold during feed-in operation, the inverter switches to the operating state "Stop". As soon as the temperature exceeds the switch-on threshold, the inverter resumes feed-in operation. The temperature of the switch-on threshold is: 20 C. 10 SCCPXT-TA-E7-en-72 Technical Information

11 SMA Solar Technology AG 3 Information for Installation Low-Temperature Option With the "low-temperature option", the operating temperature range is extended to the following range: 40 C to +62 C. The inverter is in feed-in operation until the switch-off threshold is exceeded. The temperature of the switch-off threshold is: 25 C. If the ambient temperature falls below the switch-off threshold, the inverter switches to the operating state "Stop". In addition, the installed heating elements switch on to protect the components in the interior against too-low temperatures. As soon as the temperature exceeds the switch-on threshold, the inverter resumes feed-in operation. The temperature of the switch-on threshold is: 20 C. 3.2 Dimensions Dimensions of the Inverter Dimensions of the inverter with roof Figure 8: Dimensions of the inverter with roof Dimensions of the inverter without roof Figure 9: Dimensions of the inverter without roof Technical Information SCCPXT-TA-E7-en-72 11

12 3 Information for Installation SMA Solar Technology AG Position of the Mounting Holes Figure 10: Position of the mounting holes Position A B C Designation Mounting holes for mounting on a base or mounting surface Mounting holes for mounting on a base Mounting holes for mounting on a mounting surface Dimensions of the Base SMA Solar Technology AG offers you prefabricated bases made of concrete. These bases provide ideal support for the inverter and facilitate the insertion of cables. The bases are embedded into the floor on-site. The inverter is mounted directly onto the base. The bases are designed for use in wind load zone 4. Accordingly, there are widenings on the sides increasing the stability of the base. Dimensions of the bases The listed dimensions for the concrete base may slightly deviate. We would be happy to send you the current base construction drawings. The concrete base weighs 2,360 kg. 12 SCCPXT-TA-E7-en-72 Technical Information

13 SMA Solar Technology AG 3 Information for Installation Figure 11: Dimensions of the concrete base Position A B C Designation Height of 620 mm to 900 mm Width of the foundation widening of 0 mm to 300 mm Anchoring points for the inverter 3.3 Minimum Clearances Minimum Clearances for Outdoor Installation Damage due to intake of exhaust air or blocked ventilation openings The supply air is intended to cool the inverter components. Failure to observe the specified minimum clearances can result in warm exhaust air from the inverter being drawn in. This increases the risk of a thermal short circuit. Property damage due to yield loss and damage to the components may result. Ensure that no exhaust air can be drawn in through the air inlets. Ensure that it is not possible for exhaust air to be drawn into the air intake of other devices. Make sure that the air inlets are not obstructed. Make sure that the exhaust air vents are not obstructed. Make sure that the ventilation openings are accessible for cleaning at all times. Ensure that the minimum clearances are complied with. Installation in closed electrical operating area The inverter must be installed in a closed electrical operating area. Ensure that unauthorized persons have no access to the inverter. Technical Information SCCPXT-TA-E7-en-72 13

14 3 Information for Installation SMA Solar Technology AG Observe minimum clearances Observe the minimum clearances to ensure trouble-free operation of the inverter. Maintain a certain distance between inverters installed back to back. This will facilitate maintenance and cleaning. Recommended clearance: 800 mm Minimum clearances for one inverter Figure 12: Minimum clearances for one inverter Minimum clearances between two inverters and transformer Version 1: Rear to rear Figure 13: Minimum clearances between two inverters and transformer Position Designation A Inverter 1 B Inverter 2 14 SCCPXT-TA-E7-en-72 Technical Information

15 SMA Solar Technology AG 3 Information for Installation Position C D Designation MV transformer and medium-voltage switchgear Cable route between inverter and MV transformer Minimum clearances between two inverters and transformer Version 2: Front to front Figure 14: Minimum clearances between two inverters and transformer Position Designation A Inverter 1 B Inverter 2 C D MV transformer and medium-voltage switchgear Cable route between inverter and MV transformer Recommended clearances for the facilitation of service work In order to facilitate service work, minimum clearances to the rear and sides of 1,000 mm are recommended. If you are using a service tent during installation and service work, maintain 5,000 mm clearance to the inverter. Technical Information SCCPXT-TA-E7-en-72 15

16 3 Information for Installation SMA Solar Technology AG Minimum Clearances in Electrical Equipment Rooms Damage due to intake of exhaust air or blocked ventilation openings The supply air is intended to cool the inverter components. Failure to observe the specified minimum clearances can result in warm exhaust air from the inverter being drawn in. This increases the risk of a thermal short circuit. Property damage due to yield loss and damage to the components may result. Ensure that no exhaust air can be drawn in through the air inlets. Ensure that it is not possible for exhaust air to be drawn into the air intake of other devices. Make sure that the air inlets are not obstructed. Make sure that the exhaust air vents are not obstructed. Make sure that the ventilation openings are accessible for cleaning at all times. Ensure that the minimum clearances are complied with. Minimum clearances for one inverter to be installed in electrical equipment rooms The minimum passage width between the open door of the inverter and the next fixed obstacle must be maintained. The minimum passage width must comply with national standards. Figure 15: Minimum clearances for one inverter in an electrical equipment room Position A B Designation Minimum passage width Inverter Minimum clearances for two inverters to be installed in electrical equipment rooms Danger to life due to blocked escape routes In hazardous situations, blocked escape routes can lead to death or serious injury. Opening the doors of two products located opposite each other can block the escape route. It is imperative that the escape route is freely accessible at all times. An escape route must be available at all times. Make sure the minimum passage width of the escape route meets local standards. Do not place any objects in the escape route area. Remove all tripping hazards from escape routes. 16 SCCPXT-TA-E7-en-72 Technical Information

17 SMA Solar Technology AG 3 Information for Installation The minimum passage width between the open door of the inverter and the next fixed obstacle must be maintained. The minimum passage width must comply with national standards. Figure 16: Minimum clearances for two inverters in an electrical equipment room Position A B Designation Minimum passage width Inverter 3.4 Requirements for the Support Surface If you are using a base from SMA Solar Technology AG, you must prepare the mounting location with a subgrade. The excavation pit must have the following properties: The pit must be excavated to the respective height of the base. A work area around the station must be available. The work area is at least: 500 mm. The corners of the excavation pit must be clearly marked. It must be possible to dump excavated material away from access routes so that the truck is not hindered during transport. The subgrade must have the following properties: The subgrade must be made of stone-free, compactable material without sharp edges, e.g. a horizontal lean concrete plate. The compression ratio of the subgrade must be 98%. The soil pressure must be 150 kn/m 2. The unevenness must be less than 0.25% (as per DIN 18202: table 3, line 4). The subgrade must have the following minimum dimensions: Position Width Depth Height Designation 2,600 mm 1,000 mm + double foundation extension (0 mm to 300 mm) 150 mm Technical Information SCCPXT-TA-E7-en-72 17

18 3 Information for Installation SMA Solar Technology AG The preparation of the subgrade must ensure that the base sits about 150 mm above ground level after installation. This will ensure that the inverter is protected against high water levels after heavy rain or a snow melt. If the ground is to be paved up to the inverter, a gap must be maintained between the inverter and the paved area. The gap width is: 30 mm. 3.5 Requirements for the Foundation and Cable Routing If you do not use a base from SMA Solar Technology AG, you can also position the inverter on a foundation. The foundation must have the following properties: The foundation must be suitable for the weight of the inverter. The inverter weighs: 1,900 kg. The unevenness must be less than 0.25% (as per DIN 18202: table 3, line 4). The inclination of the foundation must be between 0.5% and 1%. This will allow rain water to drain from underneath the inverter. The foundation must have at least the following dimensions: Position Width Depth Designation 2,600 mm 1,000 mm Cable feedthroughs must be provided in the foundation. For convenient operation and trouble-free maintenance, it is recommended to extend the inverter foundation on all sides or to provide a level, reinforced surface around the inverter. The foundation must have the following minimum dimensions: Position Width Depth Designation 3,400 mm 1,800 mm 18 SCCPXT-TA-E7-en-72 Technical Information

19 SMA Solar Technology AG 3 Information for Installation If the ground is to be paved up to the inverter foundation, a gap must be maintained between the foundation and the paved area. The gap width is: 30 mm. Requirements for the cable arrangement: Openings for the cables must be located in the foundation underneath the interface cabinet. Empty conduits for the cables must be laid under the foundation. Cables for communication, control and supply voltage must be separated from AC and DC cables. There must be sufficient space available to lay the cables properly. Stage at which cables are laid The stage at which the cables are laid must be determined individually for each system. Technical Information SCCPXT-TA-E7-en-72 19

20 4 Electrical Connection SMA Solar Technology AG 4 Electrical Connection 4.1 Cable Entry The DC cables, AC cables and the cables for communication can be inserted through the inverter base. 4.2 Requirements for the DC Connection DC Fuses You can connect the DC main cables from the DC sub-distribution, such as the Sunny String-Monitor, directly to the LV/ HRC fuses in the inverter via the copper lugs. The number of LV/HRC fuses available depends on the option. Apart from the terminal lugs, all materials needed for the bolted connection for the AC connection and the DC connection are included in the scope of delivery of the inverter. Cable requirements: The DC cables must be designed for the maximum PV voltage and must have double or reinforced insulation. No more than two cables must be connected to each DC terminal. Use copper or aluminum cables only. Maximum cable cross-section: 400 mm². Terminal lugs: M DC Fuses with SMB Connection Kit With the SMB Connection Kit, you can connect the DC terminals of the DC distribution boxes, such as the Sunny Main Box or the Sunny Main Box Cabinet, directly to the inverter. In each instance, three DC connection lugs are connected by means of the SMB Connection Kit. The inputs on the SMB Connection Kit are fused outside of the inverter, for example in the DC main distribution box. In this case, install disconnection blades in the inverter instead of LV/HRC fuses. With this connection option you can connect a maximum of three DC main distribution boxes to one inverter. DC inputs on the inverter per potential Use of the Sunny Main Box or Sunny Main Box Cabinet* Total number of DC inputs per potential maximum 9 no 9 maximum 6 1 Sunny Main Box 14 maximum 3 2 Sunny Main Boxes 19 none 3 Sunny Main Boxes 24 * At maximum eight DC inputs per Sunny Main Box or Sunny Main Box Cabinet Cable requirements: The DC cables must be designed for the maximum PV voltage and must have double or reinforced insulation. No more than two cables must be connected to each DC terminal. 20 SCCPXT-TA-E7-en-72 Technical Information

21 SMA Solar Technology AG 4 Electrical Connection Use copper or aluminum cables only. Maximum cable cross-section: 400 mm². Terminal lugs: M DC Busbar You can connect the DC terminals from the DC main distribution directly to the DC busbars in the inverter. The inputs are fused outside of the inverter, for example in the DC main distribution. Cable requirements: The DC cables must be designed for the maximum PV voltage and must have double or reinforced insulation. No more than two cables must be connected to each DC terminal. Use copper or aluminum cables only. Maximum cable cross-section: 400 mm². Terminal lugs: M Reduction of DC Input Currents for DC Fuses The DC inputs are fused with LV/HRC fuses. Thermal stress and alternating loads result in reduction factors which must be taken into account when designing the DC cables. The reduction factor 0.70 is applicable for regions where maximum ambient temperatures of 40 C are expected. If higher ambient temperatures are expected, a reduction factor of 0.64 must be used. Fusing Maximum DC short-circuit current I SC_STC (reduction factor 0.64 at ambient temperatures exceeding 40 C) Maximum DC short-circuit current I SC_STC (reduction factor 0.70 at ambient temperatures up to and including 40 C) 125 A 80.0 A 87.5 A 160 A A A 200 A A A 250 A A A 315 A A A 400 A A A When selecting the fuse size, always consider the short-circuit current of the connected PV array at standard test conditions (I SC_STC ). The reduction factors apply for a maximum irradiation of 1,200 W/m 2 (hourly average value of the horizontal global radiation). In case the irradiation is higher, the reduction factor must be adapted linearly. Technical Information SCCPXT-TA-E7-en-72 21

22 4 Electrical Connection SMA Solar Technology AG 4.3 Requirements for Cable Routing between MV Transformer and Inverter Risk of fire due to overheating of cables if different cable lengths are used Cables of differing lengths may cause the cables to overheat and catch fire. This can result in death or serious injury. All line conductors from the inverter to the MV transformer must be of the same length. The cable length between the connection points must not exceed a maximum length. Maximum cable length: 15 m. Cable and cable laying requirements: The cables must be designed for the maximum voltages to ground. For the Sunny Central 500CP XT / 630CP XT / 720CP XT / 760CP XT / 800CP XT, the maximum voltage to ground is: ±1,450 V. For the Sunny Central 850CP XT / 900CP XT / 1000CP XT the maximum voltage to ground is: ±1,600 V. The cables must be designed for the maximum root-mean-square value. Maximum root-mean-square value: 800 V. Do not attach more than four cables to each AC connecting plate. Use copper or aluminum cables only. Maximum cable cross-section: 300 mm². All line conductor cables must be of the same length and must not exceed the maximum cable length. The maximum cable length is 15 m. The AC cables must be bundled in the three-phase system. Between the MV transformer and the inverter, three separate cable routes for the AC cables must be available, e.g. cable channels. A line conductor L1, L2 or L3 must be laid in each cable channel. Ensure that the distance between the cable bundles is at least twice the diameter of a cable. This will prevent current imbalances. Furthermore, it is recommended to execute cabling between inverter and MV transformer directly on a grounding strap. This measure further reduces electromagnetic influences. Figure 17: Arrangement of AC cables with three cables per line conductor (example) Position L1 L2 L3 A Designation Line conductor L1 Line conductor L2 Line conductor L3 Grounding strap 22 SCCPXT-TA-E7-en-72 Technical Information

23 SMA Solar Technology AG 4 Electrical Connection 4.4 Grounding Concept In accordance with the latest technology, the inverters are discharged to ground. As a result, leakage currents to ground occur which must be taken into account when planning the PV power plant. The magnitude and distribution of such leakage currents is influenced by the grounding concept of all devices in the PV power plant. It is therefore recommended that e.g. for use of cameras and monitoring technology, signal transmission is executed in fiber-optic technology. This will counteract possible interference sources. The recommended grounding of inverter and MV transformer in meshed design reduces leakage current levels. 4.5 External Supply Voltage The inverter draws the necessary energy for internal power supply from the utility grid. The inverter can be connected to an external supply voltage of 230 V/400 V (3/N/PE). The self-consumption is distributed asymmetrically over the three line conductors and has a maximum value of 1,950 W. The connection of the neutral conductor is compulsory since there are both three-phase and single-phase loads installed in the inverter. The inverter has five terminals with a grip range of 0.08 mm to 4 mm for connecting the external supply voltage. 4.6 Communication Requirements for Data Cables A communication network can be established using the following cables: Network cables Optical fibers Network Cables Network cable requirements: The network cables must be shielded and pair-twisted. The network cables must be of at least category 5 (CAT 5). Maximum cable length: 100 m Optical Fibers For the order option with optical fibers, a splice box is integrated in the inverter. The splice box features an SC-P plug to which the optical fiber can be directly connected. Another option for connecting the optical fiber to the splice box is an optical fiber pigtail. The optical fiber is spliced in the splice box with the corresponding optical fiber pigtail. The optical fiber pigtail plug is connected to the SC-P plug of the splice box. Optical fiber requirements: The optical fiber cables must be equipped with a 50 μm multi-mode optical fiber. The optical fibers must be fitted with a subscriber connector. The optical fiber pigtail is not included in the scope of delivery External Setpoint In general, the grid operator specifies external setpoints for reactive power and active power. They are transmitted e.g. via a ripple control signal. The Power Reducer Box or the Power Plant Controller receive the setpoints from the ripple control signal and transmit these to the inverter via the communication unit. The inverter then implements the grid operator specification and feeds, for example, a specified amount of reactive power into the utility grid. Ask your grid operator which type of signal transmission is used. Technical Information SCCPXT-TA-E7-en-72 23

24 4 Electrical Connection SMA Solar Technology AG If the setpoints are not transmitted via the communication unit and the Power Reducer Box, there are terminals in the inverter to connect the analog external setpoints. The inverter processes standard signals from 4 ma to 20 ma. The inverter has two terminals for the reactive power setpoint and two terminals for the active power setpoint with a clamping range of 0.08 mm to 4 mm. The connection for the external setpoints must be made with a shielded cable External Fast Stop The inverter comes equipped with a fast stop input. You have the option of connecting an external switch to this fast stop input which is activated via a 24 V signal. The external fast stop disconnects the inverter from the utility grid in less than 100 ms. The inverter has two terminals with a grip range of 0.08 mm to 4 mm for connecting the external fast stop. The inverter is delivered with open terminals. The following options are available for configuring the external fast stop: External fast stop is deactivated The terminals of the active fast stop are bridged. The fast stop function is thus deactivated. You will need to bridge the terminals if required. External fast stop operated with internal 24 V supply An external switch (break contact) is connected to the inverter terminals via the internal supply voltage in the inverter. When the switch is closed, the relay is activated and the inverter feeds into the grid. If the fast stop is tripped, the switch opens and the relay is deactivated. The inverter is stopped and no longer feeds into the utility grid. With a conductor cross-section of 2.5 mm 2, the maximum permissible conductor length is 130 m, and with a conductor cross-section of 1.5 mm 2, the maximum permissible conductor length is 80 m. External fast stop operated with external 24 V supply An external switch (break contact) is connected to the inverter terminals via an external 24 V power supply. When the switch is closed, the relay is activated and the inverter feeds into the grid. If the fast stop is tripped, the switch opens and the relay is deactivated. The inverter is stopped and no longer feeds into the utility grid. To use the external fast stop, an external 24 V power supply buffered for three to five seconds must be available. The external fast stop must be connected in accordance with the circuit diagram. The external fast-stop function must be connected via a shielded cable. Tripping the fast stop The fast stop should only be tripped in case of imminent danger. Tripping of the fast stop does not entail fast discharge of the capacitors. If the inverter is to be switched off and properly shut down via an external signal, the remote shutdown input is to be used Remote Shutdown By means of remote shutdown, you can selectively shut down and switch off the inverter within approximately six seconds, for example, from a control room. The function of the remote shutdown is similar to the stop function of the key switch. If the remote shutdown function is activated from the control room while the inverter is in the operating state "Grid monitoring", a motor drive automatically shuts off the DC switchgear and the inverter switches to the operating state "Stop". If the remote shutdown unit is activated from the control room while the inverter is in the operating state "MPP load operation", the Sunny Central switches to the operating state "Shutdown". Once shutdown is complete, the AC disconnection unit and the DC switchgear are switched off automatically and the inverter switches to the operating state "Stop". The remote shutdown is designed as an open-circuit fail-safe function and must be connected to an external 24 V supply voltage. If 24 V is present in the remote shutdown, the inverter continues to operate in the current operating state. If the remote shutdown unit is tripped or if a wire-break occurs, 0 V is present in the remote shutdown unit and the inverter switches from the current operating state to the operating state "Stop". 24 SCCPXT-TA-E7-en-72 Technical Information

25 SMA Solar Technology AG 4 Electrical Connection Use of the remote shutdown will only be possible if the parameter ExlStrStpEna is set to On Transformer Protection A fully hermetic protector can be connected to the inverter. This fully hermetic protector is integrated in the MV transformer. If a fault occurs in the MV transformer, the inverter immediately shuts down. The inverter has two terminals with a grip range of 0.08 mm to 4 mm for connecting the transformer monitoring unit. To use the transformer monitoring unit, an external supply voltage of 230 V ~ must be provided. The transformer monitoring unit must be connected via a shielded cable. To deactivate this function, the associated parameter must be disabled Insulation monitoring In order to ensure personal and system safety in an insulated, and hence non-grounded PV system, the insulation state is monitored. If the inverter is equipped with insulation monitoring, the insulation resistance is calculated continuously by means of an active measurement procedure. Additional insulation monitoring is not necessary. Several insulation measuring devices in one system would interfere with one another and would distort the measurement results Sunny String-Monitor The Sunny String-Monitor allows for simple and efficient string-current monitoring. Errors such as string failures can be easily detected. The inverter displays the corresponding error. To connect the Sunny String-Monitor, use a cable of type Li2YCYv (TP) 4 x 2 x 0.5 mm². Technical Information SCCPXT-TA-E7-en-72 25

26 5 Overview of Transport Options SMA Solar Technology AG 5 Overview of Transport Options The inverter comprises a compact enclosure which can be transported using either a long pallet truck, a forklift or a crane fork. Transport using a crane equipped with a suitable harness is also possible. Note that the selected means of transportation must be suitable for the weight of the inverter. The weight of the inverter is: 1,900 kg. In the delivery condition, the panels in the base area have been removed so that the inverter can be transported immediately. The stable frame construction enables transport without the use of wooden pallets. In the standard scope of delivery, the inverter is delivered standing on a wooden pallet. Therefore, a truck with a maximum overall height of 4 m is sufficient for transport. Center of gravity marking This symbol indicates the center of gravity of the inverter. It can be found on the packaging and on the inverter. The center of gravity is not in the middle of the inverter. Crane The stable enclosure of the inverter with a reinforced frame allows for simple transport with a crane. The holes in the roof rail for attaching the shackles have a diameter of 40 mm. The shackles are not included in the scope of delivery of the inverter. You must disassemble the roof in order to reach the anchoring points of the shackles. Refer to the installation manual for information on the disassembly procedure. The order option "For station installation" does not include a roof for the inverter. Forklift You can lift and transport the inverter from the front or the rear using a forklift. Long Pallet Truck You can lift and transport the inverter using a long pallet truck: 26 SCCPXT-TA-E7-en-72 Technical Information

27 SMA Solar Technology AG 5 Overview of Transport Options If the inverter is being transported on a wooden pallet, it can be raised from either narrow side of the pallet. If the inverter is being transported without a wooden pallet, the pallet truck can only be moved underneath the inverter cabinet. Be careful not to damage the side panels of the inverter when moving the pallet truck underneath. Crane Fork You can lift and transport the inverter from the front or the rear using a crane fork. Technical Information SCCPXT-TA-E7-en-72 27

28 6 Preparing for Commissioning SMA Solar Technology AG 6 Preparing for Commissioning In order to commission the inverter, the following conditions must be met: Medium-voltage cables must be covered with sand. AC and DC voltages must be available. An area of 3,000 mm x 3,000 mm in front of the inverter must be reinforced. The kick plates of the inverter must be attached. One day before commissioning the desiccant bag enclosed ex works has to be replaced in the inverter cabinet. 28 SCCPXT-TA-E7-en-72 Technical Information

29

30 SMA Solar Technology